Portable aerobic spring floor



FIG. 1 is a perspective view of the portable aerobic spring floorshowing my new design;

FIG. 2 is a side elevational view thereof, the side opposite being amirror image;

FIG. 3 is an end elevational view thereof in partially open condition,the end opposite being a mirror image; and,

FIG. 4 is a bottom plan view thereof.

The ornamental design for a portable aerobic spring floor, as shown anddescribed.